chore: pin test VS Code version + .gitignore trailing newline

[paxcalpt]

Summary

Addresses the two actionable review nits from #19.

• Pin the test VS Code version in .vscode-test.mjs from stable → 1.101.0, matching the minimum declared in engines.vscode (^1.101.0). Running against stable means the binary silently auto-updates, so a future breaking change could cause hard-to-attribute CI failures. Pinning to the supported floor makes the test baseline deterministic and verifies the extension works on the oldest VS Code it claims to support.
• Add the missing trailing newline to .gitignore.

Verification

npm test against the pinned version:

✔ Downloaded VS Code into .vscode-test/vscode-darwin-arm64-1.101.0
  2 passing (35ms)
  13 pending
Exit code: 0

The third #19 nit (double findExampleManuscriptPath() call in the skip guard) was left as-is — it's a harmless micro-optimisation at test-startup speed and the duplication keeps each guard self-contained.

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Makes test execution deterministic by pinning the VS Code test runtime to the extension’s declared minimum supported VS Code version, and fixes a formatting nit in .gitignore.

Changes:

• Pin .vscode-test.mjs test VS Code version from stable to 1.101.0 (aligned with engines.vscode: ^1.101.0).
• Add the missing trailing newline in .gitignore.

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

File	Description
.vscode-test.mjs	Pins the VS Code version used by @vscode/test-cli to ensure stable, reproducible CI runs against the minimum supported version.
.gitignore	Restores a trailing newline to satisfy formatting expectations and avoid diff noise.

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[claude]

Code Review — PR #20: chore: pin test VS Code version + .gitignore trailing newline

Overview: A small, clean housekeeping PR that pins the test runner to VS Code 1.101.0 (matching engines.vscode in package.json) and fixes a missing trailing newline in .gitignore. Low risk and well-reasoned.

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What's Good

• Deterministic CI baseline. Pinning to the floor version is the right call. Running against stable means a silent VS Code update can break CI in a way that's hard to attribute to any specific code change.
• Correct floor choice. 1.101.0 directly matches the ^1.101.0 constraint in engines.vscode, so the pinned version is exactly the oldest VS Code the extension claims to support.
• The comment is useful. It explains why the version is pinned, which prevents a future contributor from casually "upgrading" it back to stable.

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Suggestions

Maintenance coupling (medium): The pinned version in .vscode-test.mjs now needs to be kept in sync with engines.vscode in package.json manually. If the minimum supported VS Code version is ever bumped, two files must change. Consider adding a brief reminder in the comment:

// Pin to the minimum supported VS Code (matches engines.vscode in package.json).
// When bumping engines.vscode, update this version too.
version: '1.101.0',

This is a nit — the existing comment is already helpful, and the linkage is clear from the PR description.

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Summary

Straightforward improvement with no risks. The maintenance-coupling note is purely informational — the change is correct as-is. Approve.